[Andrew Morton - Thu, May 15, 2008 at 10:58:03AM -0700]
| On Wed, 14 May 2008 19:44:02 +0400 Cyrill Gorcunov <gorcunov@gmail.com> wrote:
|
| > This patch does fix build bug on m68k wich does not have strncat in straight way.
| >
| > What is more important - my previous patch
| >
| > commit e662e1cfd434aa234b72fbc781f1d70211cb785b
| > Author: Cyrill Gorcunov <gorcunov@gmail.com>
| > Date: Mon May 12 14:02:22 2008 -0700
| >
| > init: don't lose initcall return values
| >
| > has introduced potential buffer overflow by wrong calculation
| > of string accumulator size.
| >
| > Many thanks Andreas Schwab and Geert Uytterhoeven for helping
| > to catch and fix the bug.
| >
| > Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
| > ---
| >
| > Index: linux-2.6.git/init/main.c
| > ===================================================================
| > --- linux-2.6.git.orig/init/main.c 2008-05-14 17:55:10.000000000 +0400
| > +++ linux-2.6.git/init/main.c 2008-05-14 19:11:18.000000000 +0400
| > @@ -702,7 +702,7 @@ static void __init do_initcalls(void)
| >
| > for (call = __initcall_start; call < __initcall_end; call++) {
| > ktime_t t0, t1, delta;
| > - char msgbuf[40];
| > + char msgbuf[64];
| > int result;
| >
| > if (initcall_debug) {
| > @@ -729,11 +729,11 @@ static void __init do_initcalls(void)
| > sprintf(msgbuf, "error code %d ", result);
| >
| > if (preempt_count() != count) {
| > - strncat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
| > + strcat(msgbuf, "preemption imbalance ");
| > preempt_count() = count;
| > }
| > if (irqs_disabled()) {
| > - strncat(msgbuf, "disabled interrupts ", sizeof(msgbuf));
| > + strcat(msgbuf, "disabled interrupts ");
| > local_irq_enable();
| > }
| > if (msgbuf[0]) {
|
| umm, why can't m68k call strncat() from init/main.c??
|
there some problem with headers iirc, we have to declare it first or
use some gcc option (as Adrian suggested). Actually I would prefer to use
strlcat there but it seems it would fail to build too. Originally I've messed
strlcat with strncat :(
- Cyrill -
--
